Grinder attachment for lathes.



Patented Oct. 16,1917.

3 SHEETSSHEETI gvvuenkoz H. T. JENSEN. GRINDER ATTACHMENT FOR LATHES.

APPLIQATION FILED 1AN.23,1917.

15,243,180. Patented Oct. 16,1917.

3 SHEETS-SHEET 2- J fwj izserzk H. T. FENSEN.

GRINDER ATTACHMENT FOR LATHES.

APPLICATION FILED JAN. 23 1917. v

Patented Oct. 16,1917.

3 SHEETS-SHEET 3 2i oer.

HANS T. JENSEN, OF SHERIDAN, WYOMING.

GRINDER ATTACHMENT FOR LATHES.

1,243,1l8tl.

Specification of Letters Patent.

Patented @ct. 46, 3191?.

Application filed January 23, 1917. Serial No. 144,016.

T all whom it may concern:

Be it known that I, HANS T. JENSEN, a citizen of the United States, residing at Sheridan, in the county of Sheridan and State of lVyoming, have invented certain new and useful Improvements in Grinder Attachments for Lathes, of which the following is a specification.

My invention relates to improvements in attachments for use in connection with lathes, such as an engine lathe.

An important object of the invention is to provide apparatus of the above mentioned character, so constructed that the parts thcerof' are free from vibration, and the grinding element or wheel may have a fine radial adjustment.

A further object of the invention is to provide apparatus of the above mentioned character, the body portion of which is nonrotatable during the operation of the apparatus, thus rendering it convenientto drive the spindle.

A further object of the invention is to provide apparatus of the above mentioned character, which is simple in construction, strong and durable.

A further object of the invention is to. provide an implement, cotiperating with the work holding device, to quickly and conveniently center the work thereon.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of apparatus embodying my invention,

Fig. 2 is a plan view of the same,

Fig. 3 is a central vertical longitudinal sectional view through the same,

Fig. 4 is an end elevation of the same,

Fig. 5 is a sectional view taken on line 55 of Fig. 3,

Fig. 6 is a perspective view of a work holding apparatus,

Fig. 7 is a plan view of the same,

Fig. 8 is a side elevation of a device for holding a work centering member,

Fig. 9 is a horizontal sectional View taken on line 99 of Fig. 8, and,

Fig. 10 is a longitudinal section through i the work centering member.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral designates the table of a lathe, upon which is rigidly mounted an upstanding bearing 16. Journaled through the bearing 16 is a main horizontal shaft 17, driven by a pulley l8, rigidly secured thereto. This pulley receives its rotation from a belt 19. Rigidly secured to the opposite end of the shaft 17 is a face-plate 20, having a central opening 21, receiving a centering plug 22.

The numeral 23 designates a couplingblock, carrying a plate 24, having a central opening 25 to receive the plug 22, and at tached to the face-plate 20 by bolts 26. The coupling-block 23 is provided at its opposite end with a plate 27, having a longitudinal groove 28 formed in its face, for a purpose to be described. I

The numeral 29 designates a relatively nonrotatable spindle housing, the outer edge of which has an annular flange 30, provided with an annular groove 31. Rotatably mounted within the groove 31 is a head 32, held therein by means of a ring 33, attached to the flange by means of screws 34, as

. shown. Rigidly connected with'the spindle housing 29 and preferably formed integral therewith is a spindle tube 35, for receiving a spindle 86, journaled in bearings 37, arranged in the spindle tube 35, and a bearing 38 arranged in the head 32. This spindle carries a pulley 39 rigidly secured thereto and arranged within the spindle housing 29. The pulley 39 is engaged and rotated by a belt 40, passing through an opening 41, as shown. It is to be understood that the invention is not restricted to this specific means for driving the spindle 36, as other suitable means may be employed. Rigidly connected with the outer ed of the spindle 36 is a rotatable grinder 42, as shown.

As more clearly shown in Figs. 3 and 5, the head 32 is provided with a plate 43, having a tongue 44, formed thereon, operating within the groove 28.

Rigidly secured to one end of the plate 27 by means of bolts is an arm 46, having an opening 47 formed therein. An adjusting screw 48 has its smooth portion rotatable within the opening 47 and has a sleeve 49 rigidly secured thereto and rotatable in a recess 56. A sleeve 51 is rigidly mounted upon the adjusting screw 48 and is preferably provided with a scale 52 coacting with "a scale 53 formed upon a boss 54, carried by position. The grinder 42 also rotates the arm 46. It is thus apparent that the adjusting screw 48 is free to rotate with respect to the arm 46 but cannot move longitude nally with relation thereto. The adjusting screw 48 extends into a screw-threaded opening 54 formed in the plate 43 and this plate 43 is attached to the plate 27 by means of screws 55, rigidlysecured to the plate 43 and operating within elongated slots or openings 56. By turning the adjusting screw'48 the head 32 may be moved radially with respect to the coupling block 23, and is therefore eccentric with relation thereto. It is apparent that the rotatable grinder 42 Will therefore be eccentric with relation to the coupling block 23 and will be made to travel in a circular path, having a greater diameter than its path of travel when in a concentric upon its axis when traveling in its orbit. The flange 30 is provided with a boss 57 having a screw-threaded opening for engagement With a rod 59, extending through an opening 60. and held against undue lateral movement. This rod serves to prevent the housing 29 from rotating.

The numeral 61 designates a carriage, mounted to slide upon the table 15 toward and away from the housing 29. Arranged upon this carriage is clamping mechanism for holding the cylinders to be ground, designated as a whole by the numeral 62. The clamping mechanism comprises an upstanding body portion or plate 63, provided centrally thereof with a preferably elliptical or vertically elongated opening 64, for the passage of the rotatable grinder 42. The plate 63 is provided with horizontal grooves 65, which are T-shaped in cross-section,

for receiving the T-heads of clampin bolts 66, operating within vertical slots 6 formed in brackets 68. The brackets 68 are rigidly secured to the carriage 61. It is thus apparent that by proper manipulation of the clamping bolts 66 the'plate 63 may be vertically or horizontally adjusted, as desired. The plate 63 carries ears 69 apertured for the reception of smooth ends of rotatable rods 70. These rods have screwthreaded portions 71, operating within screw-threaded apertures formed in cars 72, carried by a supporting bar 73, which serves to support the forward end of the engine cylinder. It is thus apparent that by rotating the rods 70 the supporting bar 73 may be vertically adjusted. I

Arranged opposite the central portion of the plate 63 is a coacting clamping plate 74, connected with the plate 63 by means of rods 75, carrying clamping nuts 76. It is obvious that the plates 63 and 74 serve to clamp the cylinder 77 therebctween.

In order that the cylinder may be conven iently and expeditiously centered upon the plate 63, this plate is provided upon its inner side with guide pins 7 8, rigidly secured thereto, and adapted for insertion within tubes 79, formed integral upon a plate 80, as clearly shown in Fig. 7 The plate 80 is provided with a vertical elongated opening 81 79 and vertically elongated openings 82. The openings 82- receive clamping bolts 83 carried by a plate 84 having a tube 85, extending through the opening 81. It is obvious that the plate 84 may be vertically adjusted with respect to the plate and by proper manipulation of the bolts 83, clamped thereto. The tube 85 is adapted to receive a spindle 86 carrying a conical centering member 87, adapted to project into the cylinder of so i the engine 77 for ascertaining when it is in the proper central position. After the engine has been properly clamped in place, the plate 80 is removed from the plate 63, and

the carriage 61 is moved toward the grinder 85 42, for introducing the same into the bore of the cylinder.

The pulley 18 rotates the main shaft 17, which turns the eccentrically supported. head or disk 32, causing the housing 29 and assoinvention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be re sorted to Without departing from the spirit of the invention or the scope of the suh- W5 joined claims.

Having thus described my invention, I claim 1. The combination with a coupling-block adapted to be secured to the rotatable ele- 1 ment of a lathe, of a head connected with the coupling-block and having a portion which is substantially circular, means to radially adjust the head with respect to the couplingblock, a relatively nonrotatable housing piv- 1 otally receiving the substantially circular portion of the head and carrying a spindle tube, a spindle arranged within the spindle tube, bearing means arranged within the spindle tube and receiving the spindle 126? means to rotate the spindle upon its axis, an

a grinder carried by the end of the spindle.

2. The combination with a coupling-block adapted to be secured to the rotatable ele ment of a lathe, of a head connected with.

the coupling-block and having a portion thereof which is substantially circular, means to radially adjust the head with respect to the coupling-block, a relatively nonrotatable housing provided with a substan- 130 While thus moving bodily in a 96 tially circular recess to pivotally receive the substantially circular portion of the coupling-bl0ck, means for preventin the rotation of the housing, a spindle tu e carried by the housing, a spindle extending longitudinally within the spindle tube, a plurality of bearings for the spindle carried by the head and the spindle tube, means to rotate the spindle,and a grinder secured to the spindle.

3. The combination with a coupling-block adapted to be secured to the rotatable element of a lathe, of a substantially circular head connected with the coupling-block, means to radially adjust the head with respect to the coupling-block, a housing provided at one end with a flange having a substantially annular recess. to pivotally receive the substantially circular head whereby the housing is pivotally supported by the head, means for preventing the rotation of the housing, a spindle tube secured to the opposite end of the housing, a bearing arranged within the inner end of the spindle tube, a

bearing arranged Within the outer end of the spindle tube, a bearing formed within the central portion of the head, a spindle extending through the spindle tube and journaled within the bearings, means to rotate the spindle upon its axis, and a grinder secured to the spindle.

l. The combination with a coupling-block adapted to be secured to the rotatable element of the lathe and having a groove formed upon its outer face, of a substantially circular head provided upon one face with a tongue to enter the groove, means for holding the coupling-block and head together, a bracket secured to the couplingblock and provided with an opening, an adjusting screw carried by the bracketand having engagement within a screw-threaded opening formed in the coupling-block, a housing provided at one end with a flange having an annular recess to receive the head,

an annular plate secured to the flange and retaining the head within the annular recess, means for preventing the housing from rotating, a spindle tube secured to the opposite end of the housing, a bearing carried by the head, a plurality ofbearings arranged within the spindle tube, a' spindle ournaled within the bearings, means to drive the spindle, and a rinder carried by the spindle.

5. T e combination with a lathe carriage, of a pair of brackets secured thereto and provided upon their upstanding portions with elongated slots, a clamping plate having a main central opening and provided section, bolts arranged within the elongated slots and having their heads disposed within the substantially horizontal grooves, substantially vertical rotatable rods connected with the ends of the clamping plate, a vertically movable supporting bar having screwthreaded engagement with the rods and arranged near the clamping plate, a coacting clamping plate, and adjustable means connecting the clamping plates. 1

7. The combination with a clamping plate, of a work holding device, of pins secured to the clamping plate, a member provided in its central portion with a tube and near its ends with tubes for receiving the pins, and a shank for insertion within the central tube and carrying a conical work centering member.

In testimony whereof I ailix my signature v in presence of two witnesses.

HANS T. JENSEN. Witnesses:

CHAs. A. RANDALL, WM. E. JORDAN. 

